unable to download iso firmware files

hi everyone,this is new to me, can any one help me, i been trying to jailbreak my iphone 4 with iso 6.0.1 tethered version using redsn0w, when i download the firmware to my pc ,it always comes up as file not encrypted, then i can not locate the firmware when i select ipsw using redsn0w, any help would be great,thanks

Re: unable to download iso firmware files

thanks for the reply, i should add this is my first iphone and this stuff may be over my head, when i save the firmware to my desktop it is a zipped file, when i try to extract the folder there is a windows pop up saying, there is a problem encrypting this file, would you like to copy the file anyways, after saying yes it breaks the folder to my desktop with 3 or 4 different documents, then when i get to the point of using redsn0w and select ipsw, i cant open the firmware file to go to the next step, I hope this makes sense how im describing it, thank again

Re: unable to download iso firmware files

thanks massie , u got me thur that step by usuing another browser, i was able to download jailbreak fileto iphone but when i went back to JUST BOOT, an error came up for MISSING PLIST KEYS for this build, i already tried putting it in dfu mode with redsn0w turn off, still have same error, i also tried different version of redsn0w, still no luck,